Some time ago, I was listening to Catholic radio and the host told the following story that is worth repeating.
A young couple, Patricia and Tom, with a four year old named Jimmy, excitedly waited for the birth of another child. Unfortunately, Patricia went into premature labor, and their little girl, Cindy, was born with a rare anomaly in her blood. She needed a blood transfusion. Cindy’s parents were not matches. Jimmy was the only member of the family with a suitable blood type.